Alinco DJ-162ED, Service Manual

Page: 7 / 23

■ ADJUSTMENT
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1. Transmitting Unit [DJ-162TD]
Item
Adjustment Point Adjustment Method Spec
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1: Frequency
adjustment
1C304 (RF PCB) Set the unit in the transmission mode at 146.03MHz and
adjustment TC304. '
(Transceiver tester, counter)
146.03MHz ±50Hz
2. TX Power
adjustment
VR301 (RF PCB)
(Hi Power)
VR302 (RF PCB)
(Lo Power)
Adjustment VR301 so that TX power becomes 3W at
146.03MHz.
Adjustment VR302 so that TX power becomes 300mW at
146.03MHz.
3.0W±0.1W
300mW±50mW
3. Modulation degree
adjustment
VR204 (IF PCB) Input a signal of 1kHz/50mV into The Mic jack
transmitting at 146.03MHz and adjust VR204 so that you
obtain 4.7kHz/Dev in the transmission mode.
4.7kHz±0.1kHz
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4. Subaudible tone VR203 (IF PCB) Adjust 88.5kHz by VR203 so that you obtain 800Hz/Dev. 800Hz±100Hz
v . -
5. DTMF. VR205 (IF PCB) Push Q] in the transmission mode and adjust VR203 so
that you obtain 3.1 kHz/Dev.
3.1kHz±0.1kHz
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2. Receiving Unit [DJ-162TD]
Item
Adjustment Pointr Adjustment Method
Spec
1. VCO P/D Voltage
adjustment
L106 (VCO) Adjust L106 so that P/D voltage is 2.0V at 145.03MHz
(DC Voltmeter) in the transmission mode. 2.0V
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2. Detection Coil
adjustment
L202 (IF PCB)
Input 1kHz, 3.5kHz/Dev. +66dB/t at 146.05MHz and
adjust L202 so that detection power becomes maximum.
!
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3. VHF FRONT END
adjustment
L306, L308, L309,
1C305, L311, L312
(RF PCB)
At 146.03MHz and adjust LB06, LB08, L309, TC305, L311,
and L312, so that 12dB SINAD sensitivity becomes
maximum. under - 9dB^
(EMF) •
4. S-meter
adjustment
VR202 (IF PCB) , Input a signal of 10d B/tfrom transceiver tester at
146.03MHz Turn VR202 so that Fuli-bar begins to tight. 10dB/i ± 1dB/t
(EMF)